Fire arch



- Nov. 24,1925- c. L. c. MAGEE mm: ARCH 7 Filed se g, s, 1922 ZZZ/6732074! am g lawza e.

Patented Nov. 24, 1925.

UNITED STATES CHAUNGEY L. C. MAGEE, OF CHICAGO, ILLINOIS.

FIRE ARCH.

Application filed September have invented a certain new and useful Improvement in Fire Arches, of which the following is a specification.

This invention relates to tile construction for furnace arches or for other purposes, a furnace arch being one embodiment of the invention, so far as the more specific aspects of the invention are concerned, but in its broader aspects the invention may be used for other purposes.

Generally stated, he object of the invention is to provide a novel and improved form and construction of tile for heat resisting or heat insulating purposes, but adapted more particularly to use in furnaces where the heat is intense, and for other similar purposes.

It is also an object to provide certain details and features of construction tending to increase the general eificiency and desirability of tile construction of this particular character.

To these and other useful ends the invention consists in matters hereinafter set forth and claimed and shown in the accompanying drawings in which Figure 1 is a perspective of a tile embodying the principles of the invention.

Figure 2 is a cross section of the furnace showing a fire arch embodying the principles of the invention.

Figure 3 is a detail section on line 3-3 in Figure 2.

Figure 4: is a sectional view showing another form of fire arch embodying the invention.

As thus illustrated, and referring to Figure 1, the improved tile may be of any suitable form or design, but preferably comprises side wall 1 and 2, the walls 1 being higher than the walls 2 and having holes 3 for the supporting means hereinafter described. The hollow tile thus provided has a bottom wall 4, and the interior of the tile may be divided into compartments by the partitions 5, so that the tile is of a cellular character, the one shown having four rectangular cells or compartments which are closed at their lower ends and open at their top ends. In practice, the tile thus formed may 5, 1922. Serial 1%. 586,332.

be made of any suitable material, but for some purposes it is preferably constructed of ifefractory material having a vitreous surace.

As shown in Figure 2, the tiles are supported by rods 6 in position to form a flat fire arch between the furnace walls 7, the furnace being of any suitable form or construction. Cells or compartments of the tiles are preferably filled with soft fire clay 8, or any other light refractory and heat insulating material. Asbestos or other heat insulating material 9 may be placed on top of the tiles to seal them, and to prevent trans mission of the heat in an upward direction. The rods 6 are supported in any suitable manner, as by the steel or iron beams 10 suitably supported by the structure of the furnace. The filling 8 of each tile contributes nothing to the strength of the fire arch structure, and is merely a load thereon, but serves to increase the heat insulating qualities of the fire arch and of the tiles to prevent upward transmission of the heat through the fire arch structure. 111 this way, therefore, comparatively high grade material can be used in the construction and the manufacture of the tiles, such as the one shown in Figure l, inasmuch as each tile comprises practically only a minimum of such material, thus permitting the use of comparatively expensive material without increasing the cost of the tiles over and above those which are commonly made solid and of somewhat cheaper material. The fillings 8 are of very cheap and inexpensive material, of course, inasmuch as this material does not sustain any structural strains, and is not required to contribute any strength to the structure, and serves merely as heat insulation to make the fire arch heat resisting and prevent the transmission of the heat in an upward direction through the arch.

In Figure 4, the tiles. are constructed in amanner similar to that previously described, but in this case each tile is tapered downward or somewhat wedge-shaped in form, inasmuch as the arch is curved and thetiles are self-supporting so to speak, and

do not have the rod supports 6 previously described. Thus, in this case, each tile 11 is made hollow and formed from high grade heat reslsting material havlng a vitreous surface, if desired, and is provided with fillings similar to the material 8 previously described and the top of each tile is sealed in any suit able manner, as by using plasticasbestostor fire clay or anyother similar'material which will serve the purpose.

It is obvious, therefore,.that the tiles thus constructed and formed can be used for various purposes, wherever heat insulation is required, the thin hard walls of the tiles supplying the strength necessary for structural strains, with a minimum of such material, and the cheap and light fillings for each tile forming sufiicientinsulation to reduce the heattransmission to-the point desired. lVhile there is some material in the structure, such as'the fillings 8, which does not contribute to the'strength or the structure, it isat the "same time obvious that by usingthin walls forthetileshighgrade and very strong materialc'an be. employed which will render the structure sufiic'iently strong as a whole, perhaps even stronger than would be obtained by using comparatively low grade solid material, and at the same time by this method the structure=is rendered lighter and even more heat resisting and less capable of transmission of the heat than would be the case with solid tiles made of certain other materials. In fact, the only heat transmitted upward through the fire arch will be the small amount which is transmitted by the thinside walls of the tiles, inasmuch as the fillings 8 maybe of absolutely non-heat conducting material, and thus the'heat is kept entirely below the arch and very little heat transmission will occur upward through the "fire arch to the space immediately above. The fillings S'may, for example, be compose-d of fine ground fire clay, or other similar material. The material for the walls of the tile maybe of superrefractory material of any suitable nature, and the links and pins 12and 18-which removably support the tiles 'on the rods -6 may be of hard iron or other suitable material. lVith this arrangement, the tiles are easily removed when broken or impaired by use, and repairs and substitutions are very easily made, it will be seen, without the necessity of disturbing the entire arch. But the inventionmay be embodied-,as shown and described, in an arch of -the 'kindshown in Figure 4, or in other ways'or in other structures, without departing from the spirit of the invention.

The fire arch shown and described serves, therefore, to reduce or minimize the escape oi heat upward from the fire below, as the filling of each tile is a non-conductor of heat, and the conductivity of each tile itself is preferably as low aspossible. Each tile has an open top'through which the filling is inserted, and each tile is arranged in position with its open top facing upward so that the fillings are not spilled out. The heat insulashown in Fig. 2 or as shown in Fig. 4, has

provisions adapting it-especially and only for overhead position in the fire arch without-obstructing the insertion of the filling in each tile. In Fig. 2 the said provisions adapting each-tile, as stated, comprise the upper ends of the side walls 1 having the holes 3 therein, while in Fig. l said provisions COIDPllSBtlIB inclined sidesoi each tile, which inclined sidesconstitute-the supporting provisions whereby-the tile is especially adapted for overhead positionin the fire arch. Also,- as shown, each tile has the partitions 5 by which its-side walls are braced, and whereby a cellular interior is provided to receive the filling, whereby to reduce theescap'e of heat'upwardly through the arch from-the fire.

lVhat I'claim as my invention is- 1. A fire arch constructed from hollow tiles of strong refractory material, presenting a smooth surface to the "fire, eachtile having a filling of heat insulating material, whereby saidhollow tilearch s'erves by' said filling of each tile'to reduce the escape of heat upward through sai'd'arch from the fire below, and each tile having provisions adapting it especially and only for overhead position in said arch, without obstructing the insertion of said filling in each tile.

2. A-structure'as-specified in claim 1, the filling of eachtil'e being composed of a -material which prevents transmission of the heat and which prevents any substantial or material addition to the structural strength of each tile.

3. A structure as specified in claim 1, said filling-within the tile comprising fine ground fire clay.

A. A structure as specified in claim Leach tile'comprising side walls and a bottom wall, and partitions therein to form cells or co1npartments which are closed at their lower ends and open at their tops, with said filling in each compartment or cell, and heat insulating means extending over the top of each tile.

5. A structure as specified in claim 1, in combination with hanger'rodsto support the tiles, and means to removably support the tiles on the lower ends of said rods.

6. A structure asspecified in claim 1, said tiles being arranged in lateral contact with each other and being provided with overhead supporting means whereby each tile is removable for purposes-of repair.

7. A tile for heat insulating purposes, comprising side walls of strong material to provide su'ificientstructural strength, forming-an opentop receptacle, integral partitions bracing the outer Walls and forming cells a filling for the cellular interior of the tile formed by the receptacle, said filling being of heat insulating material, and means to support the tile with its open top facing upward.

8. A structure as specified in claim 7, and a heat insulating covering for the top, said filling being of such character that it contributes practically nothing to the structural strength of the tile. 7

9. A structure as specified in claim 7, said walls being of hard and refractory material to resisthigh temperatures and to provide practically all of the structural strength required by the tile in use, and said filling furnishing the heat insulation and contributing practically nothing to the structural strength of the tile.

10. A structure as specified in claim 7, said Walls being comparatively thin and having a vitreous surface, and said filling being oi comparatively light insulating material of. such nature that it contributes practically nothing to the structural strength of the tile.

OHAUNGEY L. O. MAGEE. 

